Supporting-column for drilling-machines



(No Model.)

M. F. SMITH.

SUPPORTING UOLUMN FOR DRILLING MAGHINE$.

Patented Mar. 29, 1887..

WITNESSES: 4

INXENTOR ATTORNEYS.

UNITED STATES PATENT @FFICE,

MILLARD F. SMITH, OF \VEIR CITY, KANSAS.

SUPPORTING-COLUMN FOR DRILLING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 360,177, dated March 29, 1887.

(No model.)

To all whom, it may concern:

Be it known that I, MILLARD F. SMITH, of IVeir City, in the county of Labette and State of Kansas, have invented a new and Improved Supporting-Column for Drilling-Machines, of which the following is a full, clear, and exact description.

Myinvention relates to the construction of an improved form of drilling-machine that is more especially applicable for the drilling of coal, the object of the invention being to produce a machine wherein the operating mechanism is carried by a single post, which is so arranged that it may be swung upon screws, by which it is supported and upheld without in the least interfering with the rigidity of such connections; and the invention consists in the construction and arrangement of parts, as will be hereinafter fully described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figurel is a side view of my improved drilling-machine. Fig. 2 is a plan View of the machine as seen when looking in the direction of the arrow shown in connection with Fig. 1, the auger, however, being removed; and Fig. 3 is a sectional plan view taken 011 line a- 00 of Fig. 2.

In constructing such a machine as is illustrated in the drawings above referred to I provide a central supporting-post, A, which is made of gas-pipe, iron, or wood, or a combination of iron and wood, or of any other material which will produce a post of the requisite strength, but which will at the same time be comparativelylight in weight. Upon each end of the post A, I secure a sleevesuch as those shown at B Beach of the sleeves being formed with an outwardly-projecting lug, b, in which there is a centrally-threaded socket, the thread in one of the lugs being a righthand thread, while the thread in the other is a left-hand thread, the two threads being arranged in opposition. In each of the sockets I mount threaded jack-screws C.

If desired, the post A may be made of telescopically-connected sections, as indicated in the drawings, and in this case the two sections would be united by a heavy pin or bolt, (1, that is passed through apertures formed in the outer section, a, and through other apertures formed in the inner section, a, there being a number of apertures in the section a, so as to permit of the extension of suchsection, the idea being to facilitate the adjustment of the post to chambers of varying height.

Upon the main section a of the post A there is mounted an adjustable bracket, D, said bracket being made integral with a sleeve, e, that encircles the post A, and is held in any position to which it may be moved by means of a set-screw, f. The bracket D is formed with bearings g 9, one of such bearings being arranged in the upwardly-extending arm of the bracket, while the other is formed in the sleeve 6, as indicated; and in these bearingsgg I mount the trunnions t t of an internallythreaded box or barrel, I, through which the feedscrew J passes. Both ends of the feedscrew J are of the same form in cross-section, and are arranged so that either end will fit within correspondingly-formed sockets of the drill K or of the crank-handle L.

After the jack-screws C C have been set,

thus securing the post at the top and bottom,

the post may be turned entirely around and the drills may be moved to work at any angle desired, and the driller inay bore as many holes as he desires without moving the post, and as the feed-sciew J fits within the socket of either the drill or the crank-handle the depth of hole may be regulated by alternately reversing the feed-screw and adding a longer drill.

I am aware that drills have been constructed with the end screws and the feed-screw in vertical alignment, and that the feed-screw has been mounted in a block pivoted in a swiveled bearing, and I do not claim the same as of my invention; but I am not aware that a post has had oppositely-arranged jack-screws mounted in bearings at right angles thereto, thus forming a crank, by turning which and holding the screws both of the said screws will be forced outward; nor am I aware that the bearings have had open slots to receive the trunnions of the feed-screw box, so that said box and feed-screw can be readily removed together and reversed end for end.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination, with a post having pro- 5 jeotions extending at right angles from its ends and formed with vertical oppositely-threaded apertures, of the right and left hand jackscrews in said threaded apertures, a bearing connected with the post, and a feed-screw in said bearingin line with the jack-screws, whereby, by holding the jack-screws from rotating and revolving the post and its end projections, the screws Will move vertically to secure the post in position in a shaft, substantially as set forth.

MILLARD F. SMITHQ Witnesses:

J AMES DENNIS, W. W. DILKE. 

